Breast pump



FIG. 1 is a perspective view of a breast pump showing my new design;

FIG. 2 is a front view of a breast pump.

FIG. 3 is a rear view of a breast pump.

FIG. 4 is a left side view of a breast pump.

FIG. 5 is a right side view of a breast pump.

FIG. 6 is a top view of a breast pump; and,

FIG. 7 is a bottom view of a breast pump.

The broken lines depict portions of the breast pump that forms no part of the claimed design. 

CLAIM The ornamental design for a breast pump, as shown and described. 